Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al
This paper discusses the effect of the addition of noble metals on the microstructure, mechanism, and oxidation kinetics of the Ni3Al intermetallic alloy. Ni3Al was doped with 1% (atomic percent) of Au, Ag, Pd, and Pt. Oxidation behavior of the alloys was evaluated at 900, 1000, and 1100°C in O2 for...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/1616340 |
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| author | J. J. Ramos-Hernandez J. Porcayo-Calderon J. G. Gonzalez-Rodriguez Jan Mayén G. Lara-Rodriguez V. M. Salinas-Bravo L. Martinez-Gomez |
| author_facet | J. J. Ramos-Hernandez J. Porcayo-Calderon J. G. Gonzalez-Rodriguez Jan Mayén G. Lara-Rodriguez V. M. Salinas-Bravo L. Martinez-Gomez |
| author_sort | J. J. Ramos-Hernandez |
| collection | DOAJ |
| description | This paper discusses the effect of the addition of noble metals on the microstructure, mechanism, and oxidation kinetics of the Ni3Al intermetallic alloy. Ni3Al was doped with 1% (atomic percent) of Au, Ag, Pd, and Pt. Oxidation behavior of the alloys was evaluated at 900, 1000, and 1100°C in O2 for 24 hours. XRD analysis showed that the addition of noble metals favored the oxide growth on preferential crystallographic planes. In addition, the preferential substitution of the noble metals in the Ni3Al structure modifies the surface composition by increasing the Al/Ni ratio. It was observed that most of the alloys showed a subparabolic behavior, and only the intermetallic base and the alloy doped with Ag show a parabolic behavior at 900°C. The developed oxides were analyzed both superficially and in cross section by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDXA). It was evident that only the intermetallic base showed the formation of a duplex oxide scale (Al2O3/NiO). The alloys doped with noble metals showed the oxide growth practically of pure Al2O3. This was due to a decrease in the diffusion of the Ni cations because of the presence of the noble metals in the crystalline structure. |
| format | Article |
| id | doaj-art-d43eeeec296f4e5c86b684548a504d29 |
| institution | DOAJ |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-d43eeeec296f4e5c86b684548a504d292025-08-20T03:23:46ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/16163401616340Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3AlJ. J. Ramos-Hernandez0J. Porcayo-Calderon1J. G. Gonzalez-Rodriguez2Jan Mayén3G. Lara-Rodriguez4V. M. Salinas-Bravo5L. Martinez-Gomez6Facultad de Química, Universidad Nacional Autónoma de Mexico, Edificio B, Cd. Universitaria, 04510 Ciudad de Mexico, MexicoCIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, MexicoCIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, MexicoCIATEQ A.C., Eje 126 No. 225, Zona Industrial, 78395 San Luis Potosí, SLP, MexicoInstituto de Investigaciones en Materiales, Universidad Nacional Autónoma de Mexico, Cd. Universitaria, 04510 Ciudad de Mexico, MexicoInstituto Nacional de Electricidad y Energías Limpias, Avenida Reforma 113, Colonia Palmira, 62490 Cuernavaca, MOR, MexicoInstituto de Ciencias Físicas, Universidad Nacional Autónoma de Mexico, Avenida Universidad s/n, 62210 Cuernavaca, MOR, MexicoThis paper discusses the effect of the addition of noble metals on the microstructure, mechanism, and oxidation kinetics of the Ni3Al intermetallic alloy. Ni3Al was doped with 1% (atomic percent) of Au, Ag, Pd, and Pt. Oxidation behavior of the alloys was evaluated at 900, 1000, and 1100°C in O2 for 24 hours. XRD analysis showed that the addition of noble metals favored the oxide growth on preferential crystallographic planes. In addition, the preferential substitution of the noble metals in the Ni3Al structure modifies the surface composition by increasing the Al/Ni ratio. It was observed that most of the alloys showed a subparabolic behavior, and only the intermetallic base and the alloy doped with Ag show a parabolic behavior at 900°C. The developed oxides were analyzed both superficially and in cross section by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDXA). It was evident that only the intermetallic base showed the formation of a duplex oxide scale (Al2O3/NiO). The alloys doped with noble metals showed the oxide growth practically of pure Al2O3. This was due to a decrease in the diffusion of the Ni cations because of the presence of the noble metals in the crystalline structure.http://dx.doi.org/10.1155/2018/1616340 |
| spellingShingle | J. J. Ramos-Hernandez J. Porcayo-Calderon J. G. Gonzalez-Rodriguez Jan Mayén G. Lara-Rodriguez V. M. Salinas-Bravo L. Martinez-Gomez Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al Advances in Materials Science and Engineering |
| title | Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al |
| title_full | Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al |
| title_fullStr | Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al |
| title_full_unstemmed | Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al |
| title_short | Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al |
| title_sort | effect of the noble metals addition on the oxidation behavior of ni3al |
| url | http://dx.doi.org/10.1155/2018/1616340 |
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